Journal
EUROPEAN POLYMER JOURNAL
Volume 173, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2022.111289
Keywords
Epoxidized chia seed oil; Maleinized chia seed oil; poly(lactic acid) (PLA); Chia seed flour; Compatibilizer
Categories
Funding
- Ministry of Science and Innovation-? [PID2020-119142RA-I00, PAID-2019-SP20190013, ACIF/2021/185, FPU20/01732, MCIN/AEI/10.13039/501100011033]
- Ministry of Science and Innovation [PID2020-119142RA-I00]
- Universitat Politecnica de Valencia [PAID-2019-SP20190013]
- Generalitat Valenciana-GVA [PID2020-119142RA-I00, ACIF/2021/185, FPU20/01732, MCIN/AEI/10.13039/501100011033]
- [ACIF/2020/233]
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The study investigated the application of novel compatibilizers and plasticizers derived from epoxidized chia seed oil and maleinized chia seed oil in composites based on poly(lactic acid) and chia seed flour. The addition of these compatibilizers improved the mechanical and thermal properties of the composites and enhanced the interfacial adhesion between the chia seed flour particles and the poly(lactic acid) matrix.
Novel compatibilizers and plasticizers derived from epoxidized chia seed oil (ECO) and maleinized chia seed oil (MCO) have been applied in composites based on poly(lactic acid) (PLA) and 15 wt% chia seed flour (CSF). Results obtained have been compared to conventional silane coupling agent, (3-glycidyloxypropyl) trimethoxysilane (GPS), and a petroleum-based compatibilizer, poly(styrene-co-glycidyl methacrylate) copolymer (Xibond, (R)). The compatibilization effect of green composites were assessed by FTIR. The addition of all four compatibilizers improved the ductile mechanical and thermal properties of the composites. The morphology analysis revealed an improvement of interfacial adhesion of the CSF particles into the PLA matrix. In particular, ECO and MCO composites showed a roughness with long filaments in their morphology which plays a crucial role in improving the ductile properties highly. The elongation at break was 10 and 8 times higher using ECO and MCO, respectively, compared to uncompatibilized composite. Moreover, the composites manufactured showed low values (<9%) in the water uptake assay and a negligible compostability delay. The use of novel compatibilizers based on modified vegetable oils could mean an interesting proposal to obtain an entirely environmentally friendly composite with a remarkable ductile property.
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